Cpu board
About the Cpu board
Cpu board is an open source PCB design by rjw57, published on GitHub under the MIT license. It is a 2-layer board measuring 99.1 × 99.1 mm, with 68 components from 33 distinct parts.
Other key parts include the W65C816, 74HC573, 74HC04, 74HC00 and CLOCK. By type, the board carries 20 capacitors, 15 ICs, 12 resistors, 9 connectors, 4 diodes and 2 jumpers.
From the project
This board contains the CPU, RAM and ROM along with a UART. It is the smallest "standalone" computer which is of actual use within the Búri system.
Main components on the Cpu board
Cpu board bill of materials (BOM)
68 components, 33 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | W65C816 | DIP-40_W15.24mm_LongPads | U1 |
| 1 | 74HC573 | SOIC-20_7.5x12.8mm_Pitch1.27mm | U2 |
| 1 | 74HC04 | SOIC-14_3.9x8.7mm_Pitch1.27mm | U3 |
| 2 | 74HC00 | SOIC-14_3.9x8.7mm_Pitch1.27mm | U4, U11 |
| 1 | CLOCK | DIP-14_W7.62mm_LongPads | U5 |
| 1 | 74HC245 | SOIC-20_7.5x12.8mm_Pitch1.27mm | U6 |
| 1 | AS6C4008 | DIP-32_W15.24mm_LongPads | U7 |
| 1 | AT28C64B | DIP-28_W15.24mm_LongPads | U8 |
| 3 | 74HC138 | SOIC-16_3.9x9.9mm_Pitch1.27mm | U9, U10, U12 |
| 1 | TL7705A | SOIC-8_3.9x4.9mm_Pitch1.27mm | U13 |
| 1 | 7805 | TO-220_Neutral123_Vertical_LargePads | U14 |
| 1 | W65C51 | DIP-28_W15.24mm_LongPads | U15 |
| 1 | 1.8432M | Crystal_HC49-U_Vertical | Y1 |
| 1 | POWER_IN | BARREL_JACK | CON1 |
| 1 | D0..D7 | Pin_Header_Straight_1x08 | P1 |
| 1 | UART | Pin_Header_Straight_1x06 | P2 |
| 1 | A0..A7 | Pin_Header_Straight_1x08 | P3 |
| 1 | CTRL1 | Pin_Header_Straight_1x08 | P4 |
| 1 | A8..A15 | Pin_Header_Straight_1x08 | P5 |
| 1 | A16..A23 | Pin_Header_Straight_1x08 | P6 |
Show 13 more
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 1 | CTRL2 | Pin_Header_Straight_1x08 | P7 |
| 1 | UARTMINI | Pin_Header_Straight_1x04 | P8 |
| 1 | ROMWRITE | Pin_Header_Straight_1x03 | JP1 |
| 1 | Jumper_NC_Small | Pin_Header_Straight_1x02 | JP2 |
| 1 | RESET | SW_M6_PTH | SW1 |
| 4 | MOUNTING | M3_MOUNT | W1, W2, W3, W4 |
| 1 | PWR | LED_0603 | D1 |
| 1 | RST | LED_0603 | D2 |
| 1 | TX | LED_0603 | D3 |
| 1 | RX | LED_0603 | D4 |
| 17 | 100n | C_0603_HandSoldering | C1, C2, C3, C4, C5, C6, C7, C8 +9 |
| 3 | 1µ | C_Radial_D5_L6_P2.5 | C14, C16, C18 |
| 12 | 330 | R_0603_HandSoldering | R1, R2, R3, R4, R5, R6, R7, R8 +4 |
Cpu board design files
The KiCad project lives in the rjw57/buri repository on GitHub; these links point at the commit this page was built from.
Cpu board: common questions
How big is the Cpu board?
The Cpu board measures 99.1 × 99.1 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the Cpu board?
68 components, from 33 distinct parts. The full bill of materials is listed on this page.
Where can I download the Cpu board design files?
From the rjw57/buri repository on GitHub, which has the KiCad layout; the links under Design files point to each one.
Can I use the Cpu board design in my own project?
Yes, under the terms of its MIT license, which rjw57 chose for the repository.
